Add missing tests for alert payload fields

Add tests for `AlertPayloadField` and `ExtractAlertPayloadFieldsService`

ee/app/models/alert_management/alert_payload_field.rb

@@ -7,20 +7,24 @@ module AlertManagement
 
     attr_accessor :project, :path, :label, :type
 
-    SUPPORTED_TYPES = %w[string numeric datetime].freeze
+    SUPPORTED_TYPES = %w[array datetime string].freeze
 
     validates :project, presence: true
     validates :label, presence: true
     validates :type, inclusion: { in: SUPPORTED_TYPES }
 
-    validate :path_is_list_of_strings
+    validate :ensure_path_is_non_empty_list_of_strings
 
     private
 
-    def path_is_list_of_strings
-      unless path.is_a?(Array) && path.all? { |segment| segment.is_a?(String) }
+    def ensure_path_is_non_empty_list_of_strings
+      return if path_is_non_empty_list_of_strings?
+
       errors.add(:path, 'must be a list of strings')
     end
+
+    def path_is_non_empty_list_of_strings?
+      path.is_a?(Array) && !path.empty? && path.all? { |segment| segment.is_a?(String) }
     end
   end
 end

ee/app/services/alert_management/extract_alert_payload_fields_service.rb

@@ -38,19 +38,11 @@ module AlertManagement
     end
 
     def available?
-      feature_enabled? && license_available?
+      ::Gitlab::AlertManagement.custom_mapping_available?(project)
     end
 
     def allowed?
       current_user&.can?(:admin_operations, project)
     end
-
-    def feature_enabled?
-      Feature.enabled?(:multiple_http_integrations_custom_mapping, project)
-    end
-
-    def license_available?
-      project&.feature_available?(:multiple_alert_http_integrations)
-    end
   end
 end

ee/spec/models/alert_management/alert_payload_field_spec.rb

@@ -3,22 +3,40 @@
 require 'spec_helper'
 
 RSpec.describe AlertManagement::AlertPayloadField do
-  let(:alert_payload_field) { build_stubbed(:alert_management_alert_payload_field) }
+  let(:alert_payload_field) { build(:alert_management_alert_payload_field) }
+
+  describe '.validations' do
+    subject { alert_payload_field }
 
-  describe 'Validations' do
     it { is_expected.to validate_presence_of(:project) }
     it { is_expected.to validate_presence_of(:label) }
     it { is_expected.to validate_inclusion_of(:type).in_array(described_class::SUPPORTED_TYPES) }
 
-    describe '#path_is_list_of_strings' do
-      before do
-        alert_management_alert_payload_field.path = path
-        alert_management_alert_payload_field.valid?
+    context 'validates path' do
+      shared_examples 'has invalid path' do
+        it 'is invalid' do
+          expect(alert_payload_field.valid?).to eq(false)
+          expect(alert_payload_field.errors.full_messages).to eq(['Path must be a list of strings'])
+        end
+      end
+
+      context 'when path is nil' do
+        let(:alert_payload_field) { build(:alert_management_alert_payload_field, path: nil) }
+
+        it_behaves_like 'has invalid path'
       end
 
-      context 'when path is nil'
-      context 'when path is empty array'
-      context 'when path does not contain only strings'
+      context 'when path is empty array' do
+        let(:alert_payload_field) { build(:alert_management_alert_payload_field, path: []) }
+
+        it_behaves_like 'has invalid path'
+      end
+
+      context 'when path does not contain only strings' do
+        let(:alert_payload_field) { build(:alert_management_alert_payload_field, path: ['title', 1]) }
+
+        it_behaves_like 'has invalid path'
+      end
     end
   end
 end

ee/spec/services/alert_management/extract_alert_payload_fields_service_spec.rb

@@ -3,11 +3,13 @@
 require 'spec_helper'
 
 RSpec.describe AlertManagement::ExtractAlertPayloadFieldsService do
-  let(:project) { build_stubbed(:project) }
-  let(:user) { build_stubbed(:user) }
-  let(:params) { { payload: payload_json } }
-  let(:payload_json) { Gitlab::Json.generate(payload) }
+  let_it_be_with_reload(:project) { create(:project) }
+  let_it_be(:user_with_permissions) { create(:user) }
+  let_it_be(:user_without_permissions) { create(:user) }
+  let_it_be(:user) { user_with_permissions }
   let(:payload) { { foo: 'bar' } }
+  let(:payload_json) { Gitlab::Json.generate(payload) }
+  let(:params) { { payload: payload_json } }
 
   let(:service) do
     described_class.new(container: project, current_user: user, params: params)
@@ -15,18 +17,80 @@ RSpec.describe AlertManagement::ExtractAlertPayloadFieldsService do
 
   subject(:response) { service.execute }
 
+  context 'with license' do
     before do
       stub_licensed_features(multiple_alert_http_integrations: true)
-    allow(user).to receive(:can?).with(:admin_operations, project).and_return(true)
     end
 
-  it 'works' do
-    expect(response).to be_success
+    context 'with feature flag enabled' do
+      before do
+        stub_feature_flags(multiple_http_integrations_custom_mapping: project)
+      end
+
+      context 'with permissions' do
+        before do
+          project.add_maintainer(user_with_permissions)
+        end
+
+        context 'when payload is a valid JSON' do
+          context 'when payloa has an acceptable size' do
+            it 'responds with success' do
+              is_expected.to be_success
+            end
+
+            it 'returns parsed fields' do
+              fields = response.payload[:payload_alert_fields]
+              field = fields.first
+
+              expect(fields.count).to eq(1)
+              expect(field.label).to eq('Foo')
+              expect(field.type).to eq('string')
+              expect(field.path).to eq(%w[foo])
+            end
+          end
+
+          context 'when limits are exceeded' do
+            before do
+              allow(Gitlab::Utils::DeepSize)
+                .to receive(:new)
+                .with(Gitlab::Json.parse(payload_json))
+                .and_return(double(valid?: false))
+            end
+
+            it 'returns payload size exceeded error' do
+              is_expected.to be_error
+              expect(response.message).to eq('Payload size exceeded')
+            end
+          end
+        end
+
+        context 'when payload is not a valid JSON' do
+          let(:payload) { 'not a JSON' }
+
+          it 'returns payload parse failure error' do
+            is_expected.to be_error
+            expect(response.message).to eq('Failed to parse payload')
+          end
+        end
+      end
+
+      context 'without permissions' do
+        it 'returns insufficient permissions error' do
+          is_expected.to be_error
+          expect(response.message).to eq('Insufficient permissions')
+        end
+      end
     end
 
-  context 'fails when limits are exceeded'
-  context 'fails with invalid payload'
-  context 'without license'
-  context 'without feature flag'
-  context 'without permission'
+    context 'with feature flag disabled' do
+      before do
+        stub_feature_flags(multiple_http_integrations_custom_mapping: false)
+      end
+
+      it 'returns feature not available error' do
+        is_expected.to be_error
+        expect(response.message).to eq('Feature not available')
+      end
+    end
+  end
 end